Wow, that bike is mint! The diagram is helpful in showing where the speedo and tacho cables route, many thanks.
On the stay at the rear there is, on mine now, was, an inbuilt clip, with a plasticised surface. On my bike it had been bent to clip the front brake flexible pipe.
When I took it off again to rub it down ready for re-painting, I saw that the clip had parted company next to where it joins the rest of it spot welded to the main body of the stay. A little gutted to say the least, I thought I’d try brazing it back on using a Mapp torch. I’ve ordered the consumables and flux. Will practice first before attempting this.